I was homeschool from grade 5 on through high school.
I remember when my mom pulled me out of public school, she took us to a meeting with the school board and asked what the requirements were for home schooling. He told her that I could be educated on any topics/subjects as long as I passed the FL equivalency exam given by a state certified teacher. Conveniently, a local Brother was a state certified teacher and gave me a 1 hour equivalency exam every year. 90% of the test was oral. I kid you not. It was the easiest test ever. But her goal was to educate me and train me to become a missionary, to pioneer, or to serve at Bethel.
Luckily, I have always liked to read, that is what saved me. I had no textbooks besides the publications, and I was pioneering the whole time. But, my mom did buy me a set of encyclopedias at a garage sale and I used to read them. I took my own self to the local community college when I turned 18 and passed my GED on my first try. Then I enrolled in classes. I had no math training and had to take remedial math but passed them all and went on to take college algebra and passed everything with A's.
It wasn't until I got to community college that I started using my mind and learning to think. It was amazing, I never knew I was smart or could learn about biology, chemistry, or algebra. It was such an accomplishment for me, of course my mother still thinks that was the beginning of my demise. hahahaa...
I have seen both though, great examples of dedicated parents and examples of just pioneering and training for "missionary" work... I remember being told I "didn't need any of that other education" to be a pioneer and serve where the need was great, that "Jehovah provides us with everything we need"